Downstream Time Domain Based Adaptive Modulation for DOCSIS Based Applications
    2.
    发明申请
    Downstream Time Domain Based Adaptive Modulation for DOCSIS Based Applications 有权
    基于DOCSIS的应用的下行时域自适应调制

    公开(公告)号:US20100074167A1

    公开(公告)日:2010-03-25

    申请号:US12409461

    申请日:2009-03-23

    IPC分类号: H04B7/212 H04L12/56

    摘要: In a DOCSIS based satellite gateway data is transmitted over a single downstream channel, at different throughput rates. Data destined for each subscriber/receiver is assigned a throughput rate depending upon the downstream signal quality of that subscriber/receiver. To accomplish this, the downstream DOCSIS MAC data is parsed to extract DOCSIS packets. The DOCSIS packets are then loaded into packet queues based on an identifier within such packets such as the MAC destination address or SID. Each of the queues represents a bandwidth efficiency or throughput rate that can be currently tolerated by specific subscribers based on the current signal quality being experienced at the subscriber location. A PHY-MAP describing the downstream data structure to be transmitted and inserted into the downstream data. Data is extracted from the packet queues in queue blocks as defined by the PHY-MAP. The queue blocks are modulated with transmission parameters appropriate for each queue block and transmitted to the DOCSIS based satellite modems. The satellite modems extract the PHY-MAP from the downstream data and use the information contained in it to demodulate and decode the queue for which they have sufficient downstream signal quality. Satellite modems measure and transmit downstream signal quality to the satellite gateway to be used to assigned traffic to the appropriate queues.

    摘要翻译: 在基于DOCSIS的卫星网关中,数据通过单个下游信道以不同的吞吐率传输。 根据该用户/接收机的下行信号质量为目的地为每个用户/接收机指定的数据被分配吞吐率。 为了实现这一点,下游DOCSIS MAC数据被解析以提取DOCSIS分组。 DOCSIS分组然后基于诸如MAC目的地址或SID之类的分组内的标识符加载到分组队列中。 每个队列表示基于当前在用户位置处经历的信号质量,特定订户可以容忍的带宽效率或吞吐率。 描述要发送并插入下游数据的下游数据结构的PHY-MAP。 从PHY-MAP定义的队列块中的数据包队列中提取数据。 使用适合于每个队列块的传输参数调制队列块,并将其发送到基于DOCSIS的卫星调制解调器。 卫星调制解调器从下游数据中提取PHY-MAP,并使用其中包含的信息对其具有足够的下行信号质量的队列进行解调和解码。 卫星调制解调器测量和传输下行信号质量到卫星网关,用于将流量分配给适当的队列。

    Downstream time domain based adaptive modulation for DOCSIS based applications
    3.
    发明授权
    Downstream time domain based adaptive modulation for DOCSIS based applications 失效
    基于DOCSIS的应用的下游时域自适应调制

    公开(公告)号:US07508785B2

    公开(公告)日:2009-03-24

    申请号:US10319929

    申请日:2002-12-12

    IPC分类号: H04B7/212

    摘要: In a DOCSIS based satellite gateway data is transmitted over a single downstream channel, at different throughput rates. Data destined for each subscriber/receiver is assigned a throughput rate depending upon the downstream signal quality of that subscriber/receiver. To accomplish this, the downstream DOCSIS MAC data is parsed to extract DOCSIS packets. The DOCSIS packets are then loaded into packet queues based on an identifier within such packets such as the MAC destination address or SID. Each of the queues represents a bandwidth efficiency or throughput rate that can be currently tolerated by specific subscribers based on the current signal quality being experienced at the subscriber location. A PHY-MAP describing the downstream data structure to be transmitted and inserted into the downstream data. Data is extracted from the packet queues in queue blocks as defined by the PHY-MAP. The queue blocks are modulated with transmission parameters appropriate for each queue block and transmitted to the DOCSIS based satellite modems. The satellite modems extract the PHY-MAP from the downstream data and use the information contained in it to demodulate and decode the queue for which they have sufficient downstream signal quality. Satellite modems measure and transmit downstream signal quality to the satellite gateway to be used to assigned traffic to the appropriate queues.

    摘要翻译: 在基于DOCSIS的卫星网关中,数据通过单个下游信道以不同的吞吐率传输。 根据该用户/接收机的下行信号质量为目的地为每个用户/接收机指定的数据被分配吞吐率。 为了实现这一点,下游DOCSIS MAC数据被解析以提取DOCSIS分组。 DOCSIS分组然后基于诸如MAC目的地址或SID之类的分组内的标识符加载到分组队列中。 每个队列表示基于当前在用户位置处经历的信号质量,特定订户可以容忍的带宽效率或吞吐率。 描述要发送并插入下游数据的下游数据结构的PHY-MAP。 从PHY-MAP定义的队列块中的数据包队列中提取数据。 使用适合于每个队列块的传输参数调制队列块,并将其发送到基于DOCSIS的卫星调制解调器。 卫星调制解调器从下游数据中提取PHY-MAP,并使用其中包含的信息对其具有足够的下行信号质量的队列进行解调和解码。 卫星调制解调器测量和传输下行信号质量到卫星网关,用于将流量分配给适当的队列。

    Explicit congestion notification for DOCSIS based broadband communication systems
    4.
    发明授权
    Explicit congestion notification for DOCSIS based broadband communication systems 失效
    基于DOCSIS的宽带通信系统的显式拥塞通知

    公开(公告)号:US07606188B2

    公开(公告)日:2009-10-20

    申请号:US11633630

    申请日:2006-12-05

    IPC分类号: H04B7/212

    CPC分类号: H04B7/18523

    摘要: Satellite communications are carried out using the Data Over Cable Interface Specification (DOCSIS). Satellite modems are notified of upstream channel congestion by inserting a congestion notification message in a medium access protocol (MAP) message for the upstream channel. Specifically, the congestion notification message is inserted in an unused field of the MAP message, such as the explicit congestion notification (ECN) field. The MAP message can also carry other characteristics of the upstream channel, including priority threshold, multicast access burst availability, and available bandwidth.

    摘要翻译: 卫星通信使用数据通过电缆接口规范(DOCSIS)进行。 通过在上游信道的媒体接入协议(MAP)消息中插入拥塞通知消息,向卫星调制解调器通知上行信道拥塞。 具体地说,将拥塞通知消息插入MAP消息的未使用字段中,例如显式拥塞通知(ECN)字段。 MAP消息还可以携带上行信道的其他特性,包括优先权阈值,组播接入突发可用性和可用带宽。

    Modified upstream channel descriptor messages for DOCSIS-based broadband communication systems
    5.
    发明授权
    Modified upstream channel descriptor messages for DOCSIS-based broadband communication systems 有权
    用于基于DOCSIS的宽带通信系统的修改的上行信道描述符消息

    公开(公告)号:US08098606B2

    公开(公告)日:2012-01-17

    申请号:US10420805

    申请日:2003-04-23

    摘要: A method, apparatus and computer program product for generating and processing upstream channel descriptor (UCD) messages in a DOCSIS-based broadband communications system, such as a DOCSIS-based two-way satellite communications system, is provided. A satellite modem termination system (SMTS) generates a UCD message that includes one or more standard parameters pertaining to an upstream channel of the two-way satellite communications system, wherein the one or more standard parameters are defined in accordance with the DOCSIS protocol, and one or more satellite application-specific parameters pertaining to the upstream channel, wherein the one or more satellite application specific parameters are not provided for by the DOCSIS protocol. The UCD message is transmitted to a satellite modem that extracts both the standard and satellite application-specific parameters for use in managing communication over the upstream channel.

    摘要翻译: 提供了一种用于在基于DOCSIS的宽带通信系统(例如基于DOCSIS的双向卫星通信系统)中生成和处理上行信道描述符(UCD)消息的方法,装置和计算机程序产品。 卫星调制解调器终端系统(SMTS)生成包括与双向卫星通信系统的上行信道相关的一个或多个标准参数的UCD消息,其中一个或多个标准参数根据DOCSIS协议来定义,以及 与上游信道相关的一个或多个卫星应用特定参数,其中DOCSIS协议不提供一个或多个卫星应用特定参数。 UCD消息被发送到卫星调制解调器,其提取用于管理在上行信道上的通信的标准和卫星专用参数。

    Explicit congestion notification for DOCSIS based broadband communication systems
    6.
    发明申请
    Explicit congestion notification for DOCSIS based broadband communication systems 失效
    基于DOCSIS的宽带通信系统的显式拥塞通知

    公开(公告)号:US20070147281A1

    公开(公告)日:2007-06-28

    申请号:US11633630

    申请日:2006-12-05

    IPC分类号: H04B7/212 H04L12/413

    CPC分类号: H04B7/18523

    摘要: Satellite communications are carried out using the Data Over Cable Interface Specification (DOCSIS). Satellite modems are notified of upstream channel congestion by inserting a congestion notification message in a medium access protocol (MAP) message for the upstream channel. Specifically, the congestion notification message is inserted in an unused field of the MAP message, such as the explicit congestion notification (ECN) field. The MAP message can also carry other characteristics of the upstream channel, including priority threshold, multicast access burst availability, and available bandwidth.

    摘要翻译: 卫星通信使用数据通过电缆接口规范(DOCSIS)进行。 通过在上游信道的媒体接入协议(MAP)消息中插入拥塞通知消息,向卫星调制解调器通知上行信道拥塞。 具体地说,将拥塞通知消息插入MAP消息的未使用字段中,例如显式拥塞通知(ECN)字段。 MAP消息还可以携带上行信道的其他特性,包括优先权阈值,组播接入突发可用性和可用带宽。

    Downstream adaptive modulation in broadband communications systems
    9.
    发明授权
    Downstream adaptive modulation in broadband communications systems 有权
    宽带通信系统中的下行自适应调制

    公开(公告)号:US07197276B2

    公开(公告)日:2007-03-27

    申请号:US10097942

    申请日:2002-03-15

    IPC分类号: H04H1/00

    摘要: A downstream adaptive modulation system and method. The downstream adaptive modulation system comprises a wireless access termination system and one or more wireless modems. The wireless access termination system includes a plurality of queues and a parser. The parser parses data traffic onto the plurality of queues. Each queue is associated with a different coding and modulation scheme. Each of the one or more wireless modems receives data traffic from the plurality of queues based on the wireless modem's ability to demodulate and decode the signal from each of the plurality of queues. When a wireless modem experiences a change in signal strength, the present invention enables the wireless modem to adapt to data from other queues to compensate for the change in signal strength. Thus, if the signal strength improves over a period of time, the wireless modem may receive data at a higher order modulation and FEC code rate. If the signal strength weakens over a period of time, the wireless modem may receive data at a lower order modulation and FEC code rate.

    摘要翻译: 一种下行自适应调制系统及方法。 下行自适应调制系统包括无线接入终端系统和一个或多个无线调制解调器。 无线接入终端系统包括多个队列和解析器。 解析器将数据流量分析到多个队列上。 每个队列与不同的编码和调制方案相关联。 一个或多个无线调制解调器中的每一个基于无线调制解调器解调和解码来自多个队列中的每一个的信号的能力,从多个队列中接收数据业务。 当无线调制解调器经历信号强度的变化时,本发明使得无线调制解调器能够适应来自其他队列的数据以补偿信号强度的变化。 因此,如果信号强度在一段时间内改善,则无线调制解调器可以以较高阶调制和FEC码率接收数据。 如果信号强度在一段时间内衰减,则无线调制解调器可以以较低阶调制和FEC码率接收数据。